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Finding the Fourth Proportional to 8,761.70, 13,125.54 and 7,779.98

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Solution

The fourth proportional to 8,761.70, 13,125.54 and 7,779.98 is: 11,654.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,761.70 : 13,125.54 = 7,779.98 : x
  2. Step 2: Convert to fraction form
    8,761.70/13,125.54 = 7,779.98/x
  3. Step 3: Cross multiply
    8,761.70x = 13,125.54 × 7,779.98
  4. Step 4: Simplify right side
    8,761.70x = 102,116,500.68
  5. Step 5: Solve for x
    x = 102,116,500.68/8,761.70
  6. Step 6: Final answer
    x = 11,654.87

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.